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LOT 2281
Large Cut and Polished Fossil Ammonite Halves
JURASSIC PERIOD, CIRCA 199-145 MILLION YEARS B.P.
9 1/4 - 9 1/2 in. (3.77 kg total, 23.5-24 cm).
Each with a cut base and polished internal face showcasing the internal gas chambers of the ammonite. [2, No Reserve]
ProvenanceFrom Madagascar.
From the private collection of a Devon, UK, lady.
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AUCTIONS:
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![Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves](https://timelineauctions.com/upload/images/items/small/256013-s.jpg)
Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves
Sold for (Inc. bp): £26
Comprising five translucent, polished slices and ten cut and polished geode sections. 1.68 kg total, 5.3-14.2 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
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Seymchan Meteorite Cross-Section
Circa 4.5 billion years B.P.Sold for (Inc. bp): £8,450
A magnificent polished cross-section from the Seymchan pallasite meteorite, revealing the honeycomb-like structure characteristic of pallasites, with translucent olivine crystals embedded within iron-nickel crystals; accompanied by a custom-made display stand. 356 grams, 23.2 cm
Discovered in 1967, recovered from the bed of the river Hekandue in the Magadan District, Russia (62° 54’ N, 152° 26’ E).
The main mass of 272.3 kilograms was found during a survey in June 1967 by geologist F. A. Mednikov. The mass was a triangular-shaped thumb-printed meteorite lying among the stones of the brook bed. A second specimen of 51 kilograms was found with a mine detector at a distance of 20 meters from the first in October 1967 by I. H. Markov. During a new expedition in 2004, Dmitri Kachalin recovered about 50 kilograms of new material. Remarkably, about 20% of the new specimens were found to contain olivine crystals, and so revealed the silicate nature of the meteorite. The pallasitic structure was not previously discovered during studies on small metal-only sections of the original mass. The distortion of the Widmanstatten patterns is interpreted as shearing of the superheated meteorite as it broke up in the Earth's atmosphere. -
Polished 'Orca' Agate Display Piece
Sold for (Inc. bp): £20
Polished freestanding stone with attractive white formations against a dark background. 554 grams, 99 mm
From a Cambridgeshire, UK, collection.
